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Questions and Answers
What occurs to the discrete atomic levels when atoms are brought closer together to form a crystal?
What occurs to the discrete atomic levels when atoms are brought closer together to form a crystal?
- They disappear
- They remain unchanged
- They broaden to form bands of allowed energies (correct)
- They become more discrete
What is the term for the upper band in the Energy Band Model, where electrons can easily be moved by the application of external electric fields?
What is the term for the upper band in the Energy Band Model, where electrons can easily be moved by the application of external electric fields?
- Conduction Band (correct)
- Valence Band
- Energy Gap
- Forbidden Gap
What type of materials have a large number of electrons in the conduction band?
What type of materials have a large number of electrons in the conduction band?
- Superconductors
- Good conductors of electricity (correct)
- Semiconductors
- Insulators
What is the term for the series of energy levels containing valence electrons in the Energy Band Model?
What is the term for the series of energy levels containing valence electrons in the Energy Band Model?
What is the type of bonding that occurs between silicon atoms in a solid?
What is the type of bonding that occurs between silicon atoms in a solid?
What is the arrangement of silicon atoms in a solid?
What is the arrangement of silicon atoms in a solid?
What is the primary reason why silicon and germanium are insulators at very low temperatures?
What is the primary reason why silicon and germanium are insulators at very low temperatures?
What happens to the covalent bonds in silicon and germanium at finite temperatures?
What happens to the covalent bonds in silicon and germanium at finite temperatures?
What is the term for electrons that are still bound to the nucleus of their respective atoms in silicon and germanium?
What is the term for electrons that are still bound to the nucleus of their respective atoms in silicon and germanium?
What is the arrangement of atoms in the crystalline solid structure of silicon and germanium?
What is the arrangement of atoms in the crystalline solid structure of silicon and germanium?
What is the energy required to break a covalent bond in silicon and germanium?
What is the energy required to break a covalent bond in silicon and germanium?
What happens to the number of conduction electrons in silicon and germanium as the temperature increases?
What happens to the number of conduction electrons in silicon and germanium as the temperature increases?
In a p-type semiconductor, trivalent impurities like Boron create holes in the crystal structure due to their deficiency of how many valence electrons?
In a p-type semiconductor, trivalent impurities like Boron create holes in the crystal structure due to their deficiency of how many valence electrons?
What term is used to describe impurities in a semiconductor that have only 3 valence electrons and accept an electron from the doped material?
What term is used to describe impurities in a semiconductor that have only 3 valence electrons and accept an electron from the doped material?
What term is used to describe the majority carriers in a p-type semiconductor?
What term is used to describe the majority carriers in a p-type semiconductor?
Which of the following elements is considered a trivalent impurity in a semiconductor material?
Which of the following elements is considered a trivalent impurity in a semiconductor material?
What is the term used to describe a semiconductor material that has been doped with trivalent impurities and contains holes as the majority carriers?
What is the term used to describe a semiconductor material that has been doped with trivalent impurities and contains holes as the majority carriers?
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